方式1 - 定义成类使用
#1. 定义
from log import logger
class AsstException(Exception):
def __init__(self, message):
super().__init__(message)
logger.error(message)
#2. 使用
from exception import AsstException
class Messenger(object):
def __init__(self, sc_key):
if not sc_key:
raise AsstException(\'sc_key can not be empty\')
方式2 - 直接assert使用
\'\'\'使用方法20200612
assert True # 条件为 true 正常执行
语法格式如下：
assert expression
等价于：
if not expression:
raise AssertionError
\'\'\'
def is_existed(file_path):
cursor.execute(\'SELECT COUNT(*) FROM photo WHERE path = ? AND existed = 1\', (file_path,))
row = cursor.fetchone()
return row[0] != 0
assert not is_existed(temp_file)
方式3 - except 使用
# Python < 2.6
try:
3/0
except Exception, e:
print \'str(Exception):\t\', str(Exception) #输出 str(Exception):<type \'exceptions.Exception\'>
print \'str(e):\t\t\', str(e) #输出 str(e):integer division or modulo by zero
# Python > 2.6
try:
3/0
except Exception as e:
print (\'str(Exception):\t\', str(Exception) ) #输出 str(Exception): <class \'Exception\'>
print (\'str(e):\t\t\', str(e) ) #输出 str(e): division by zero
# except 多个
try:
print(x)
except NameError:
print("Variable x is not defined")
except: # except Exception as e的写法
print("Something else went wrong")
- except捕获【多个】异常，列表【index error处理】
x= {\'vesion\': \'05.R08;\'}
try:
print(x[\'rru_vesion\'].split(\';\')[0].split(":")[1])
except (KeyError, IndexError) as e:
print(e)